"Nay," they say, "(these are) medleys of dream! - Nay, He forged it! - Nay, He is (but) a poet! Let him then bring us a Sign like the ones that were sent to (Prophets) of old!"

Shakir 5:

Nay! say they: Medleys of dreams; nay! he has forged it; nay! he is a poet; so let him bring to us a sign as the former (prophets) were sent (with).

Pickthal 5:

Nay, say they, (these are but) muddled dreams; nay, he hath but invented it; nay, he is but a poet. Let him bring us a portent even as those of old (who were Allah's messengers) were sent (with portents).

Mohsin Khan: 5:

Nay, they say: "These (revelations of the Qur'an which are revealed to Muhammad صلى الله عليه وسلم) are mixed up false dreams! Nay, he has invented them! - Nay, he is a poet! Let him then bring us an Ayah (sign as a proof) like the ones (Prophets) the former were sent (with)!"

Saheeh: 5:

But they say, "[The revelation is but] a mixture of false dreams; rather, he has invented it; rather, he is a poet. So let him bring us a sign just as the previous [messengers] were sent [with miracles]."